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I’ve been researching the O2 sensor bypass for the 2012 KLX250S, and I found that some people are using a 330-ohm resistor to eliminate the O2 sensor. But I couldn’t find any clear information specifically for the KLX250S.
I also found the photo below from another source, but I’m not sure if it applies to my KLX.
Has anyone here actually used an O2 eliminator on a KLX250S and measured it with a multimeter?
I’m sure the eliminator has a resistor inside, but I don’t know the exact value for this model.
If anyone has confirmed resistor values for the KLX250S O2 heater circuit, please share your measurements or experience. Thanks!
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The oxygen sensor this bike uses is a conventional narrow-band type.
It can only tell the computer if the engine is running at a 14.7:1 air/fuel ratio.
All the computer can do is react to the output voltage as it swings from 1V to 0V.
That hi-lo voltage happens every time it swings from rich to lean, and back again to lean, over and over again.
When the o2 signal swings BELOW 0.5V, the computer will add fuel until the o2 reads ABOVE 0.5V
The only way to use a real-time air/fuel ratio correction is with a wide-band o2 sensor, and being able to change the fueling map in the computer.
sorry for the bad news, but that's the only way to really fix it.
Klx 250s o2 2012
